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Subject: [PATCH] SUNRPC: Fix xdr_encode_bool()
From:   Chuck Lever <chuck.lever@oracle.com>
To:     linux-nfs@vger.kernel.org
Date:   Tue, 19 Jul 2022 09:18:35 -0400
Message-ID: <165823671509.3047.16569036635528856192.stgit@manet.1015granger.net>
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I discovered that xdr_encode_bool() was returning the same address
that was passed in the @p parameter. The documenting comment states
that the intent is to return the address of the next buffer
location, just like the other "xdr_encode_*" helpers.

The result was the encoded results of NFSv3 PATHCONF operations were
not formed correctly.

Fixes: ded04a587f6c ("NFSD: Update the NFSv3 PATHCONF3res encoder to use struct xdr_stream")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 include/linux/sunrpc/xdr.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 5860f32e3958..986c8a17ca5e 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -419,8 +419,8 @@ static inline int xdr_stream_encode_item_absent(struct xdr_stream *xdr)
  */
 static inline __be32 *xdr_encode_bool(__be32 *p, u32 n)
 {
-	*p = n ? xdr_one : xdr_zero;
-	return p++;
+	*p++ = n ? xdr_one : xdr_zero;
+	return p;
 }
 
 /**